Charged-particle pseudorapidity density distributions from Au+Au collisions at sqrt(sNN)=130 GeV
arXiv:nucl-ex/0106006 · doi:10.1103/PhysRevLett.87.102303
Abstract
The charged-particle pseudorapidity density dNch/deta has been measured for Au+Au collisions at sqrt(sNN)=130 GeV at RHIC, using the PHOBOS apparatus. The total number of charged particles produced for the 3% most central Au+Au collisions for |eta|<=5.4 is found to be 4200+-470. The evolution of dNch/deta with centrality is discussed, and compared to model calculations and to data from proton-induced collisions. The data show an enhancement in charged-particle production at mid-rapidity, while in the fragmentation regions, the results are consistent with expectations from pp and pA scattering.
9 pages, 3 figures